Curve Speed Control System with Adaptive Map Preview Time and Driving Mode Selection

Inactive Publication Date: 2009-02-05
GM GLOBAL TECH OPERATIONS LLC
View PDF14 Cites 75 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]In accordance with the teachings of the present invention, a system and method are disclosed for detecting a road curve as a vehicle approaches the curve, automatically providing road curvature information and controlling vehicle speed. The system uses a locating device, such as a GPS receiver, and a map database to know the vehicle's position relative to curves in the road. Depending on the speed of the vehicle, the system generates a curvature profile for different curvature data points at or around the curve in front of the vehicle. Based on the curvatur

Problems solved by technology

Driving too fast on a road curve could cause not only discomfort for vehicle occupants, but also, under some circumstances, the loss of vehicle control.
Failure to perform a proper maneuver may result in not only repeated adjustments of the brake and steering, but also, possibly serious accidents by crossing the lane boundary or going off the road.
Through study and simulation, a smaller curve radius has been shown to require a larger steering input and steering error increases linearly with required steering wheel angle.
This system has limitations in that the system is calibrated to provide road curvature information at a predetermined distance of the c

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Curve Speed Control System with Adaptive Map Preview Time and Driving Mode Selection
  • Curve Speed Control System with Adaptive Map Preview Time and Driving Mode Selection
  • Curve Speed Control System with Adaptive Map Preview Time and Driving Mode Selection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014]The following discussion of the embodiments of the invention directed to a system and method for identifying a curve in the road for a vehicle, and automatically providing braking if the vehicle is traveling too fast for the curve, is merely exemplary in nature, and is in no way intended to limit the invention or its applications or uses.

[0015]The present invention proposes a curve speed control system for a vehicle that automatically provides a braking command to vehicle brakes if the system is activated and the vehicle is approaching a curve too quickly. As will be discussed in detail below, the curve speed control system adaptively provides road curve information at certain intervals from the vehicle depending on the vehicle speed. Further, the present invention includes a driver cornering mode that allows the vehicle operator to selectively control the aggressiveness that the curve speed control system will allow the vehicle to travel through the curve.

[0016]FIG. 1 is a bl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A system and method for detecting a road curve as a vehicle approaches the curve, automatically providing road curvature information and controlling vehicle speed. The system uses a locating device and a map database to know the vehicle's position. Depending on the speed of the vehicle, the system generates a curvature profile for different curvature data points at or around the curve in front of the vehicle. The system then generates a desired speed profile for the curvature points. The desired speed profile and the actual vehicle speed are compared to determine whether the vehicle is traveling too fast for the target speed at each profile point. The acceleration computation can be enhanced by providing a driver cornering mode input that the vehicle operator can select based on how aggressively the driver wants the system to act to slow down the vehicle.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This invention relates generally to a system and method for detecting whether a vehicle is approaching a curve in the mad too fast, and if so, automatically providing braking control and, more particularly, to a system and method for determining whether a vehicle is approaching a curve in the mad too fast, and if so, automatically providing braking control, where the system and method adaptively determine when to provide curvature information of the curve based on vehicle speed and selectively provide driver aggressiveness control.[0003]2. Discussion of the Related Art[0004]Driving too fast on a road curve could cause not only discomfort for vehicle occupants, but also, under some circumstances, the loss of vehicle control. If a driver approaches a curve at too high of a speed, vehicle control prior to normal curve steering begins with a reduction in vehicle speed. The deceleration level required for a curve depends on ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G05D13/00G01C21/26G06F17/11G01S5/00
CPCB60W30/045B60W40/076B60W40/072B60W30/143B60W30/18145B60W2552/30B60W2552/15
Inventor LEE, YONG H.DENG, WEIWENZHANG, HAICEN
Owner GM GLOBAL TECH OPERATIONS LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products